You start off in Dungeon Crawl Classics by making several 0 level characters, probably 4, and an occupation which will give you the worst weapon imaginable and hopefully a useful item.
It is worth considering that character creation is typically a communal experience in Fabula Ultima; you should use this article to familiarize yourself with the process.
Despite limited options for virtual tabletops supporting Candela Obscura, I think all three options ahead are strong contenders depending on your style as a Game Master and your players' needs.